K18
K18 Biomimetic Hairscience Leave-In Molecular Repair Hair Mask
Moderate
1 scans
Expert note
Revolutionary leave-in with patented K18PEPTIDE that actually reconnects broken keratin chains (clinically proven). However, formula contains TWO drying alcohols (Alcohol Denat. and Isopropyl Alcohol) to help peptide penetration, and 4 fragrance allergens. The peptide technology is impressive but the vehicle is not the cleanest. Worth the premium price for severely damaged hair. Use sparingly - a little goes a long way. NO MI/MCI.
K18 Biomimetic Hairscience Leave-In Molecular Repair Hair Mask by K18 — a mask formulated to balance and care for scalp and hair. Designed to leave hair feeling refreshed and lightweight.
K18
K18 Biomimetic Hairscience Leave-In Molecular Repair Hair Mask
Moderate
1 scans
Expert note
Revolutionary leave-in with patented K18PEPTIDE that actually reconnects broken keratin chains (clinically proven). However, formula contains TWO drying alcohols (Alcohol Denat. and Isopropyl Alcohol) to help peptide penetration, and 4 fragrance allergens. The peptide technology is impressive but the vehicle is not the cleanest. Worth the premium price for severely damaged hair. Use sparingly - a little goes a long way. NO MI/MCI.
K18 Biomimetic Hairscience Leave-In Molecular Repair Hair Mask by K18 — a mask formulated to balance and care for scalp and hair. Designed to leave hair feeling refreshed and lightweight.
Full Ingredient List
Water, Alcohol Denat., Propylene Glycol, Cetearyl Alcohol, Dicaprylyl Ether, Cetyl Esters, Behentrimonium Chloride, sh-Oligopeptide-78 (K18PEPTIDE), Hydrolyzed Wheat Protein, Hydrolyzed Wheat Starch, Tocopherol, Isopropyl Alcohol, Fragrance, Geraniol, Linalool, Hexyl Cinnamal, Benzyl Alcohol, Phenoxyethanol
Key Ingredients
Water
Base solvent
Alcohol Denat.
Drying alcohol - helps peptide penetration but can dry hair
Propylene Glycol
Penetration enhancer for active delivery
Cetearyl Alcohol
Fatty alcohol for conditioning
Dicaprylyl Ether
Lightweight emollient
Cetyl Esters
Emollient and texture agent
Ingredient Breakdown
| Ingredient | Details | Rating |
|---|---|---|
| Water | Base solvent | Good |
| Alcohol Denat. | Drying alcohol - helps peptide penetration but can dry hair | Moderate |
| Propylene Glycol | Penetration enhancer for active delivery | Moderate |
| Cetearyl Alcohol | Fatty alcohol for conditioning | Good |
| Dicaprylyl Ether | Lightweight emollient | Good |
| Cetyl Esters | Emollient and texture agent | Good |
| Behentrimonium Chloride | Conditioning quaternary | Good |
| sh-Oligopeptide-78 (K18PEPTIDE) | Patented bioactive peptide that reconnects broken keratin chains - clinically proven | Good |
| Hydrolyzed Wheat Protein | Strengthening protein | Good |
| Hydrolyzed Wheat Starch | Conditioning starch derivative | Good |
| Tocopherol | Vitamin E antioxidant | Good |
| Isopropyl Alcohol | Drying alcohol solvent | Moderate |
| Fragrance | Added scent | Moderate |
| Geraniol | Fragrance allergen | Moderate |
| Linalool | Fragrance allergen | Moderate |
| Hexyl Cinnamal | Fragrance allergen | Moderate |
| Benzyl Alcohol | Fragrance/preservative | Moderate |
| Phenoxyethanol | Safe preservative | Moderate |
Safety & Allergens
Fragrance allergens (linalool, geraniol, coumarin) may be present if fragrance is listed.
Colorants are aesthetic only — skip if you react to synthetic dyes.
Strong surfactants and fragrance can bother very sensitive scalps.
Patch test before full use if you have fragrance allergies or reactive skin.
Summary
Best suited for users seeking a clear, balanced cleanse. Effectively targets buildup while maintaining a light feel. Be mindful of surfactant strength and fragrance if you are sensitive.
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